Geoff, I resealed mine and haven't had any problems. I only resealed the inside though. I did not take it apart. I took a razor blade and cut the inside out leaving a small amount still in the seams. Then I cleaned what I cut off really well and wiped the glass with rubbing alcohol. Then I siliconed over what I left. I then took a piece of cardboard and clipped the corner off. I smoothed the slicone from bottom to top. The seams look awesome and I haven't had any problems. I did not tamper with the bottom seams at all though. The problem with mine was, it was used and whoever had it had damaged the seams a good bit. Hope this helps.
Oh yeah I've heard that you can take acetone and rub over the remaining silicone in the seams. This will soften the silicone and let the new silicone adhere to the old silicone better. Check on that though, I know Barry knows so shoot him a pm.